VERITAS Volume Manager 3.1 Migration Guide

Converting LVM to VxVM
Converting LVM Volume Groups to VxVM Disk Groups
Chapter 2 29
there are problems during conversion. Some of them (e.g. backing up
user data) are left to you to accomplish through your regular
administrative processes.
The steps in the conversion process are:
Step 1. Identifying LVM volume groups for conversion.
Step 2. Analyzing an LVM group to see if conversion is possible.
Step 3. Taking actions to make conversion possible if analysis fails.
Step 4. Backing up your LVM configuration and user data.
Step 5. Planning for new VxVM logical volume names.
Step 6. Stopping application access to volumes in the volume group to be
converted.
Step 7. Converting a volume group.
Step 8. Taking actions if conversion fails.
Step 9. Implementing changes for new VxVM logical volume names
Step 10. Restarting applications on the new VxVM volumes.
Step 11. Tailoring your VxVM configuration.
These steps are described in detail in later sections of this chapter.
Annotated examples on how to use vxvmconvert are shown in
“Examples”. For information on restoring back to your original LVM
configuration refer to “Restoring the LVM Volume Group Configuration”.
Conversion Steps Explained
1. Identifying LVM disks and volume groups for conversion
The obvious first step in the conversion process is to identify what you
want to convert. The native LVM administrative utilities like vgdisplay
and SAM can help you identify candidate LVM volume groups as well as
the disks that comprise them.
You can also use the vxvmconvert and vxdisk commands to examine
groups and their member disks. The information presented through the
vxvmconvert and vxdisk utilities and their interpretation is shown in
“Examples”.